emery



6N9 Model.) 3 Sheets-Sheet 1.

V A;DfEMERY. WEFT STOP MOTION FOR LOOMS.

No.60EL601} I Patented June 14,1898.

(N0 Modem 3 Shets-Sheet 2.

A. D. EMERY.

WEFT STOPMOTION FOR LOQMS. N 01. r Patented June 14, 1898.

(No Model.) 3 Sheets-Sheet 3.

A. D. EMERY. WEFT STOP MOTION FOR LOOMS.

No. 605,601. Patented June.l4, 1898.

1311/ pnior Maw gee MW) R5 00.. Pucnuu'moq WASHINGTON, D c.

' ST T S PATENT I Looms, of

replacing the weft.

ABRAM-D. EMERY, OFTAUNTON, MASSACHUSETTS, ASSIGNOR TO THE UNIVERSAL LOOM COMPANY, OF NEW YORK, N. Y.

WEFT STOP-MOTIQNFOR LOOMS..

SPECIFICATION forming part of Letters Patent No. 5,601, dated June 14, 1898.

i Application filed February 19,1897. SerialNo. 624,113. (to model.)

To all whom it may concern):

Be it known-that I, ABRAMD. EMERY,'of

Taunton, Massachusetts, have invented cer-- tain Improvements in Weft stop Motionsfor which the following is a specification.

My improvements, which are herein illustrated. as embodied in an upright 'loom em ploying a shuttle stop-motion of the character of that shown and described in my pend- .ing application for Letters Patent of the United .States serially numbered 624,384, consist of a weft stop-motion, the weft-fork of which is by means of suitable connections combined with the spring-actuated progressively-acting stopping instrumentality, which in my pending application Serial No. 596,248 is shown, described, and claimed, in combi nation with a plurality of stop-motions, with common connectionsto said stopping instrumentality. The said stopping instrumentality is adapted to bring the operativeparts of the'loom to rest without any smash'entirely by its progressive action during a prescribed part of one revolution of the lay-driving shaft and is combined in the present case'with a weft stop-motion, which is brought into operation if the weft breaks or runs out and which is so timed as to perform its function of tripping said progressively-acting stopping instrumentality into action at such predetermined stage in the revolution of the lay-driving shaft as will result in stopping the loom with the lay down, the shed open, and with the shuttle in that one of the boxes where it is most convenient of access for the purpose of By means of suitable connections the weft-fork is so combined with the take-up mechanism that the effective operation of the take-u p mechanism terminates concurrently with the beat by which in the absence ,of a weft the weft stop-motion is brought into operation. 7

The accompanying drawings, representing the weft stopmotion, alsoshow the shuttle stop-motion referred to,together with so much of the loom asis necessary to illustrate the modes of operation of the stop-motions. The drawings are as follows:

Figure 1 is a transverse vertical section of an upright loom, showingthe principal members of thestop-motions in elevation. Fig. 2

is a transverse section of the lay, showing the manner in which the weft stop-motion is set intojaction if a weft-thread breaks or gives out. .Fig. 3 is a horizontal section taken through the plane indicated by the dotted linefw a; on Fig. 1, affording a top view of portionsof the lay and the stop-motions. Fig. 4 is ari' elevatiompartly in section, of the parts shown in Fig.3. Fig. 5 is atop view of the portion of the lay immediately adjacent to the weft-fork. Fig. 6 is a vertical section taken through the plane indicated by the dotted line y 3 on Fig. "5, showing the vertical recesses for the weft-fork in the wall of the lay. Fig. 7 is an elevation of the weft-fork, showing the adjacent part of the lay in ver* tical section. Fig. 8 is an end elevation of the'take-up and the device fortrippingit out of action. Fig. 9 is an elevation of the driving-gear, showing the belt-shifter, the brakewheel, and their appurtenances. Fig. 10 is an elevation showing the face of the brakewheel and adjacent parts.

The drawings show portions of an upright loom-frame composed in part of the standards'A A and the horizontal girders B B.

. Thedriving-shaft C is provided with the driving-pulley O and the loose pulley C The position of the driving-belt is governed by the fbelt-shifter forks D'D, affixed to the horizontal slide-bar D, having pivoted to its front end the hand-lever D A collar D affixed to the'slide-bar D, has attached toit the free end of a contracting spiral spring D, the opposite end of which is secured to the girder B. When the loom is running normally, the driving-belt, as shown in Fig. 1, is retained in engagement with the drivingpulley O by means of the trip-lever E, pivoted at the rear end to the frame of the loom and having near its forward end a shoulder E", which engages the collar D When the hand-lever D is swung outward into the positoe F, projecting laterally fromits hnb,,en-

gages a collar F, affixed to the upper end of the slide-rod F and pulls the slide-rod F upward and thereby compresses the expanding spiral spring F which abuts at its upper end against the perforated'bracket F through tion in which it is represented n Fig. l,'the j which the rod F slides, and delivers its thrust against the collar F affixed to the lower end of the sliderod The collar F on the upper end of the slide-rod F has fastened to it the free end F of the brake-strap F which partially surrounds the brake-wheel F affixed to the driving-shaft O, and has its opposite end F secured to the frame of the loom.

The stopping of the loom involves the lifting, either manually or otherwise, of the forward end of the trip-lever E. This disengages the shoulder E from the collar D and thus releases the belt-shifter slide-bar .l) to the action of the contracting spring D The spring I) then pulls the slide-bar D backward and shifts the belt to the loose pulley O and at the same time swings backward the hand-leverD swinging downward the toe F and thereby releasing the brakestrap F to the influence of its adjustable actuatingspring F hen the toe F is withdrawn from the collar F, the brake-strap F being thus released, is tightened around the brake-wheel in part by the expansion of the spring F and in part by the frictional influence upon the brake-strap of the periphery of the brakewheel, which rotates, as indicated by the curved arrow on Fig. 10, in such direction as to make that frictional influence tend to pull the brake-strap away from its fixed end F and thus cause it to tighten itself upon the brake-wheel. The effectiveness of the strapbrake thus organized is such that by varying the position of the collar F the tension of the spring F can be so regulated with relation to the speed at which the loom is running as to always effect the the stopping of the loom at the expiration of a predetermined period after the belt-shifter and strap-brake have been released by the tripping of the trip-lever E, and the loom can thus always be brought to rest with its parts in a prescribed position. The tripping of the trip-lever E is automatically effected by the operation of the hereindeseribed weft stopanotion whenever a weftthread breaks or runs out.

The weft stop-motion embraces the weftfork G, pivoted to the free end of the lever G, which is affixed to the rock-shaft- G having its bearings in brackets affixed to the loom-frame. An arm G, extending laterally upward from the lever G, is provided with an adjustable screw-bolt G, adapted to bear against the girderll and therebyaet as a stop to limit the range of downward swing of the lever G. A link G", connected at its upper end to the lever G, is provided near its lower end with a longitudinal slot G for admitting a pin G affixed to and projecting laterally from the trip-lever E.

If a weft-thread is present beneath prongs of the fork when the lay ll: ascends, the fork is tilted by the weft-thread into the position in whiehit is represented in Fig. l, in which, as will be seen, its shank bears against the guard G affixed to the lever G, and the backwardly-turned upper end 5 of the shank of the weft-fork is swung forward clear of the path of motion of the free end of the eonstautly-vibrating lifting-arm g, the opposite end of which is loosely mounted on a stud inserted transversely through a bracket secured to the loom-frame. Ateverytwobeats of the lay the liftingarni g is vibrated once upward and once downward by means of the pitman g pivoted at its upper end to thelifting-arm g and provided at its lower end with the eccentric-strap g, surrounding the occentrie g affixed to the cam-shaft g, which makes one revolution while the lay-driving shaft is making two revolutions. The vibrations of the lifting-arm g are so timed that the latter part of the upward excursion of the arm is coincident with the beat which ensues immediately after the shuttle I has been boxed in the shuttle-box 1, adjacent to the fork G. If the weft-thread has run out or has been broken, the weft-fork under the influence of gravity retains the position in which it is represented in Fig. 2, and its backwardly-t urned upper end y will be caught by the free end of the lifting-arm g, which therefore during the concluding part of its upward movement will carry upward the fork G and lift the free end of the lever G, and thus raise the triplever E clear of the collar D and therebytrip the belt-shifter and brake into action and stop the loom.

During the time occupied in stopping the loom the lay descends to its lower position and the shuttle is thrown from the box I into the box at the opposite end of the lay. Two useful results are thus seen red, to wit: first, the loom comes to rest with the shed open, and, secondly, with the shuttle in the box adjacent the starting and stopping levers, where the new weft-thread can most convenientlybe supplied and adjusted by the operator. lVhen the lever G is lifted, a finger .I, affixed to the rock-shaft G", (illustrated in Fig. 8,) is swung upward and trips the re taining-pawl J out of engagement with the ratchetwheel J which gives motion to the take-up roll. The ratchet-wheel .l is thereby left free to turn backward with its driving-pawl J and consequently the take-up roll ceases to take up the fabric. The side walls and bottom of the lay II are suitably recessed to contain the weft-fork, as illnstrated in Figs. 5, t3, and '7.

The shuttle stop-motion referred to isherein illustrated for the purpose of showing that, although it and the weft stop-motion are re spcctively combined with the same trip-lever for simultaneously tripping into action the belt-shifter and the self-tightening strapbrake, each is capable of independent operation without interfering with the other.

To stop the loom if the shuttle fails to box properly, each shuttle-box is provided with a movable cheek K, which works in a slot K, formed in the rear sidewall of the box. The

outer end of the cheek K is vertically pivoted to the lay, and its opposite end has affixed to its ends affixed to the box K whichaffords one of the bearingsfor the rock-shaft and has its opposite end secured to the collar K, which is secured to the rock-shaftby the set-screw K. The torsional strain of the spring K tends 'to press the crank-arms against the finger of the cheek-pieces'K-and thus rock the free ends of the cheek-pieces into the path of the shuttle. So long as the shuttle boxes itself properly in either box it pushes/out the cheek-piece K'of the box in which it is seated and thus rocks the rock-shaft K against the influence of its torsion-,sprin g X. A dagger is, rigidly secured to and projecting upwardly from the rock-shaft K is thusswung out of operative position. If the shuttle fails to reach its place in either of the boxes, the rock-shaft K is not rocked, and the dagger 7c inclines so far the stud 9 inserted transversely through a one of the adjacent sidetmembers L bracket secured to the loom-frame. The lever has pivotally connected with it the upper end of the adj ustably-extensible link 70, provided about midway of its length with the shoulder 715 which, when the lever k is pushed upward'by the dagger 70, engages the pin is,

projecting laterally from the trip-lever E, and

thus lifts the trip-leverE out of engagement with the collar D and, thereby trips the beltshifter and strap brake into action and quickly stops the 100m. An arm 70 projecting upwardly from the leverk is provided with an adjustable screw-bolt which by bearing against the girder 13 serves asa stop to limit the range of downward movement of the lever 10 The'lower extremity of thelink k is connected by a crank-arm kflaffixed to the rock-shaf t 7s". with tworadially-projecting sears L L, one of which is shown in elevation in Fig. l in the position which the scars occupy when the loom is running normally, in which position each sear engages the rear extremity L of arms L extend transversely across and are affixed to the rock-shaft M. The forward ends of the arms L afford the bearings for the whip-roller L WVhen the loom is running normally, the warp-threads Z are maintained under proper tension and extend upward from the warp-beam Z over the whiproller.L thence under the fluff-catching trough Z and upwardly therefrom across the ing to rest.

The rock-shaft k is provided The lease-rods Z and'through' the heddles Z and the reed Z to the weaving-line of the fabric in process of 'beingwoven. 'If the shuttle fails to box properly, the link 10 trips the sears L and thus releases the whip-rollerframe, which thereupon drops from the position in which it is represented in solid lines in Fig. l to theposition in which it is represented in dotted lines in said figure. This'so greatly slackens the warp that there will be no breaking of the warp-threads even if the shuttle remains in the shed while the loom is com- This slacking of the warp only takes place when the loom is stopped by the failure of the shuttle to box properly.

What is claimed as the invention is- ;1. The combination, in an upright loom, as herein set forth,of a spring-actuated progressively-acting stopping instrumentality, adapted to bring the operative parts of the loom to rest by its progressive action during a prescribed part of one revolution of the lay-driving shaft; a trip-lever for normally holding said stopping instrumentality out of action;

a weft -fork and connections between said weft-fork and said stopping instrumentality, whereby if the weft-thread breaks or runs out the loom will be stopped with the lay down and the shed open.

2. The combination, in anupright loom, of a spring-actuated progressively-acting stopping instrumentality, adapted to stop the loom by its progressive action during a prescribed part of one revolution of the lay-driving shaft; a trip-lever for normally holding said stopping instrumentality out of action; a weft-fork and connections between said weftfork and said trip-lever, whereby if a weftthread breaks or runs out said trip-lever will be tripped at the conclusion of one beat of the lay, and the loom brought'to rest before the lay can make another beat.

3. In an upright loom, the combination, as h'erein'set forth, of a spring-actuated progressively-acting stopping instrumentality adapted to stop the loom by its progressive action during a prescribed part of one revolution of mally holding said stopping instrument-ality Ice out of action; a weft-fo'rk-carrying lever; a

constantly-vibrating lever arranged in proximity to said weft-fork-carrying lever; a weftfork pivotally mounted upon the free end of said weft-fork-carrying lever, and adapted to connect said weft-fork-carrying lever with said constan tly-vibrating lever during the lat ter part of the beating motion of the lay if the weft-thread has run out or been broken goon nections between said Weft fork carrying lever and said trip-lever; a weighted detent adapted to engage a ratchet-wheel connected to the take-up roller for preventing said takeup roller from turning backwardly while the loom is in normal operation, and connections between said weftefork-carrying lever and out of the weft-thread effects the instant disl l i the warp and connections between said Weftfor]; and said stopping whereby if a Weft-thread breaks or runs out the 100m will be stopped with the shuttle in 15 the box adjacent to the side of the warp opposite that where the Weft-fork is arranged.

instrumcntaiity,

ABRAM D. EMERY.

Vitnesses:

ESTELLE M. EMERY, E. GA'JTERER. 

